Steinhauer, who also led after the first two rounds, had three birdies and two bogeys during an up-and-down round of 1-under 71 that left her at 12-under 204 on the Panther Creek Country Club course.

Rachel Hetherington was a stroke back after a 67, and Christina Kim, coming off a second-place finish last week in the Safeway Classic, had a 71 to join Michele Redman at 10 under. The 42-year-old Redman made the biggest third-round move, shooting a 64.

Sorenstam, defending the last of her 69 career LPGA Tour titles, had a 71. She was at 9 under along with Becky Morgan (69). Sorenstam is playing her seventh tournament since returning from a ruptured disk in her neck.

The 36-year-old Swede came from five shots behind in the final round to win last season, the last in a 31-year run at The Rail Golf Club. Sorenstam closed with a 10-under 62 to match the lowest final-round score by a tournament winner in tour history.